package com.study.three;

import com.alibaba.fastjson.JSONArray;

import java.util.*;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class three {
    public static void main(String[] args) {
        List<Apple> list = new ArrayList<>();
        for (int i=0 ; i<10; i++){
            Apple apple = new Apple();
            apple.setName("苹果"+i);
            apple.setWeight("重量"+i);
            apple.setColor("颜色"+i);
            list.add(apple);
        }
//        Map  appleList = new HashMap<String,Object>();
//        appleList.put("list",list);
//        ArrayList<Apple> list1 =(ArrayList<Apple>)appleList.get("list");
        String str = list.stream().filter(n -> n.getName().equals("苹果0")||n.getName().equals("苹果1")).map(n -> n.getName()).collect(Collectors.joining("_"));
        System.out.println(str);  //打印：苹果0_苹果1

    }
}
